The following tools and references have been released or updated this week:
Lync Server 2010 Help File Documentation (CHM format) – Complete (downloadable and searchable) help file of all the available Lync documentation on Technet Library
Lync Server 2010 Capacity Calculator – Spreadsheet for calculating a user’s hardware requirements based on information about users and traffic
Lync Server 2010 Stress and Performance Tool (7577.120) – Used to prepare, define, and validate performance targets of user scenarios